1971 burb as found 12_3_23_226pm - ETC test.hpt
That's using all the throttle tables copied from this file: 2013 Tahoe 1GNSCBE0XDR190936 5.3 LMG 1436583546.hpt
(I did check the calibrations and both VINs use the same Engine & Slave segments so it's not impossible that this will be the fix, and those tables never should have been changed by PSI)